>> reporter: well, the fbi is expected to arrive, as you know, randi, in libya today. they are trying to keep somewhat of a low profile because their presence there is a sensitive one. we do know from a source with knowledge of the investigation that agents have been conducting interviews outside the country trying to gather as much information as they can about what happened in benghazi. investigators also plan to gather information on those people who are arrested by libyan authorities. now the libyan authorities have already come out and said that they don't believe those people who are custody had any direct knowledge or direct contact with the people who had carried this out, but they are trying to figure out exactly where that leads by gathering background information on those people. >> and what is the intelligence on this so far here in the u.s.? i mean, did the u.s. know anything at all ahead of time? wasn't there some type of warning that went out? >> yeah. there's a little bit of monday morning quarterbacking going on, with all of the intelligence that's com